package cn.wolfcode.wolf2w.interceptor;

import cn.wolfcode.wolf2w.annotation.RequiredLogin;
import cn.wolfcode.wolf2w.domain.UserInfo;
import cn.wolfcode.wolf2w.redis.service.IUserInfoRedisService;
import cn.wolfcode.wolf2w.util.JsonResult;
import com.alibaba.fastjson.JSON;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CheckLoginInterceptor implements HandlerInterceptor {
    @Autowired
    private IUserInfoRedisService userInfoRedisService;

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response,Object handler) throws Exception{

        //排除跨域问题
        if (!(handler instanceof HandlerMethod)){
            return true;
        }
        //获取当前要执行的控制器的处理方法
        HandlerMethod handMethod = (HandlerMethod)handler;

        String token = request.getHeader("token");
        UserInfo user = userInfoRedisService.getUserByToken(token);
        //方法上是否有注解
        if (handMethod.hasMethodAnnotation(RequiredLogin.class)){
            if (user == null){
                response.setContentType("application/json;charset=utf-8");
                response.getWriter().write(JSON.toJSONString(JsonResult.noLogin()));
                return false;
            }
            return true;
        }

        //放行
        return true;
    }


}
